Smith & Nephew RT-PLUS - Setting the Tibial Rotation; Tibial Size Determination

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Tibial size determination
Assemble the tibial sizer trial and handle,
and place on the resected bone surface.
The tibial sizer trial should completely cover
the cortex, without projecting beyond the
tibia. In case of doubt, a lateral projection is
preferred because a medial projection may
cause irritation of the pes anserinus. If the
projection is not acceptable, a smaller size
should be used (pay attention to the combi-
nation!). The correct tibial size is then
determined.
Important
A size 2 tibial component cannot be com-
bined with a size 4 femoral component.
Setting the tibial rotation
The tibial rotation is determined anatomically
and statically (orientation in relation to the
tibial tuberosity, and the axial alignment rod
tip must point to the centre of the ankle joint).
After preliminary drilling with the ∅ 3.2 mm
drill, set the tibial sizer in place using at least
two bone pins with heads.